List of JavaScript runtimes - 2025

Node.js

https://nodejs.org/

Engine: V8

Features:

• Extensive ecosystem with npm.
• Long-term community support and large developer base.

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Deno

https://deno.com/

Engine: V8

Features:

• Secure by default (sandboxed environment).
• Built-in utilities for modern development (e.g., file fetch, testing).

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Bun

https://bun.sh/

Engine: JavaScriptCore

Features:

• Extremely fast runtime.
• Integrated bundler, transpiler, and package manager.
• Built-in support for popular APIs like fetch and WebSocket.

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Winter.js

https://github.com/wasmerio/winterjs

Engine: SpiderMonkey

Features:

• Supposed to be fast.
• idk

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Txiki.js

https://github.com/saghul/txiki.js

Engine: QuickJS

Features:

• Lightweight and embeddable.
• Cross-platform with minimal dependencies.
• Ideal for constrained environments.

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Napa.js

https://github.com/microsoft/napajs

Archived
Engine: V8

Features:

• Multi-threaded JavaScript runtime.
• Provides workers for parallel execution.

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Window.js

https://windowjs.org/

Archived
Engine: QuickJS

Features:

• Lightweight runtime for building GUI applications.
• Minimal dependencies, built for simplicity.
• Integrated rendering engine for native-like UI.